Long-term soil experiments: Keys to managing Earth's rapidly changing ecosystems

Agriculture & Biology

• ecosystems 100%
• soil 67%
• soil management 51%
• edaphic factors 25%
• biogeochemical cycles 24%
• food production 22%
• economic demand 19%
• soil productivity 14%
• biological assessment 14%
• environmental assessment 13%
• adverse effects 9%
• prediction 7%

Earth & Environmental Sciences

• ecosystem 78%
• soil 56%
• experiment 52%
• soil management 41%
• nutrient cycling 19%
• food production 18%
• sustainability 13%
• environmental assessment 9%
• twenty first century 8%
• society 6%
• timescale 6%
• productivity 6%
• demand 5%
• economics 5%
• need 4%
• loss 4%
• prediction 4%
• trend 4%
• effect 2%